Road rollers



July 10, 1956 J. F. HARRISON ROAD ROLLERS IN VEN TOR ATTORNEYS 5 Sheets-Sheet l July 10, 1956 J. F. HARRlsoN ROAD ROLLERS s sheets-sheet' 2 Filed 001,. 8, 1952 IN VENTOR rTOHNFHA/efe/so/v,

ATTORNEYS July 10, 1956 J. F. HARRISON ROAD ROLLERS 5 `Sheets-Sheet 5 Filed Oct. 8, 1952 INVENTOR TToRNEx/s` nited States Patent ROAD ROLLERS John F. Harrison, Springfield, Ohio, assigner to The Buffalo-Springfield Roller Co., Springlield, Ohio, a corporation of Ohio Application October 8, 1952, Serial No. 313,660

6 Claims. (Cl. 94-50) This invention is a novel improvement in so-called 3-axle tandem road rollers of the type disclosed in U. S. Letters Patent issued to Carl F. Greiner No. 2,015,891, issued October 1, 1935; also as disclosed in the application of John F. Harrison, Serial No. 169,749, filed June 22, 1950; also as disclosed in the application of Carl F. Greiner, Serial No. 290,183, filed May 27, 1952. In each of these applications the road roller is of the 3-axle tandem type, the same comprising a drive roll which is power driven by a motor on the road roller frame, also a pair of guide rolls arranged in tandem with the drive roller and adapted to be simultaneously steered in order to control the direction of the forward and rearward movement of the road roller, one of the guide rolls being adapted to be locked in the horizontal plane of the drive roll and the other guide roll to roll a plane surface or to be positioned above or below the said plane to effect rolling of concave or convex surfaces.

The present invention is an improvement on the means for permitting raising and lowering of one of the guide rolls with respect to the plane of the other guide roll and the drive roll, while permitting simultaneous steering of the two guide rolls.

Another object of the invention is to provide a road roller of the above type with a tilting beam mounted on a horizontal axis on the road roller frame, and carrying the trunnion for the king post of the vertically adjustable guide roll, together with means for holding the tilting beam in adjusted position, together with means for simultaneously steering the two guide rolls.

Other minor objects of the invention will be hereinafter set forth.

I will explain the invention with reference to the accompanying drawings, which illustrate several practical embodiments thereof, to enable others familiar with the art to adopt and use the same; and will summarize in the claims, the novel features of construction, and novel combinations of parts, for which protection is desired.

In said drawings:

Figure 1 is a side elevation of a 3-axle tandem road roller showing one embodiment of my invention.

Fig. 2 is a top plan view of the guide roll end of the road roller, shown in Fig. 1.

Fig. 3 is an enlarged vertical section on the line 3 3, Fig. 1.

Fig. 4 is a side elevation of a 3axle tandem road roller showing a modified arrangement of the parts.

Fig. 5 is a top plan view of the guide roll end of the road roller shown in Fig. 4.

Fig. 6 is a side elevation showing a further modified form of a 3-ax1e tandem roller embodying my invention.

Fig. 7 is a top plan view of the guide roll end of the road roller, shown in Fig. 6.

As shown in Figs. l, 2 and 3, the road roller is of the 3-axle type, the same comprising spaced opposed side frames 1 1, adjacent one of which is mounted in suitable bearings the axle 2 which carries a drive roll 3 which is driven from a suitable prime mover (not shown) ICC mounted in the usual manner between 1the frames 1 1, the speciic means for driving drive roll 3 forming no part of my present invention.

The ends of the side frames 1, opposite from drive roll 3, are arched upwardly as at 1a and extend forwardly as at 1b to support the trunnion for the end guide roll 5, the extensions 1b being sufficiently rigid to prevent lateral or vertical deflection on the same. As shown in Figs. 2 and 3, the forward ends of the extensions 1b are bent backwardly upon themselves through arcs 1c and project rearwardly as at 1d, providing therebetween a rectangular opening in which the tilting beam hereinafter referred to is mounted, the free ends of the rearward extending portions 1b being secured to a cross member 1e, Fig. 2, extending between the opposite arched portions 1a.

At the forward ends of the extensions 1li-1d are mounted bearings 6 for the pivot pins 7 of the tilting beam hereinafter described, the horizontal axes of the pivot pins 7 intersecting the vertical axis of the trunnion 8 for the king post 9 of yoke 10 of end guide roll 5, which trunnion 8 is mounted between the horizontal plates 11 and 12 (Fig. 3) which are disposed between the vertical side walls 13 13 of the tilting beam, which side walls 13 13 are connected at their ends as shown in Fig. 2 by rounded wall portions 13a-13a, the side and end walls 13 13a and the plates 11 and 12 forming a rigid unit. The side walls 13 at their outer end portions carry bearings 13b receiving the inner ends of the pivot pins 7 as shown in Figs. 2 and 3. When the tilting beam 11 1213 is tiled on the pivots 7, the vertical axis of the king pin 9 will in all tilting positions of the tilting beam transfx the horizontal axes of the beam pivots 7 7.

The rear end portion of the tilting beam 11-12-13 carries trunnion 14 for the king post 15 of yoke 16 for intermediate guide roll 4 whereby, as the tilting beam is raised or lowered, intermediate guide roll 4 will be correspondingly raised or lowered, accompanied by a slight shifting of the axis of the king pin 15 (Fig. 1) with respect to the true vertical. At the same time, the axis of king pin 9 of the end guide roll 5 will also shift a corresponding amount, but the distance between the axes of king pins 9 and 15 will remain constant regardless of the tilting movement of the tilting beam 11 12 13.

As shown in Figs. 1 and 2, the inner end of tilting beam 13 carries a rearward extension 13x, in which is journaled a horizontal pin 13p which is pivotally connected to the lower end'of a piston rod 17 entering a cylinder 18 which is of double-acting type and which is pivoted as at 18a on plate le, whereby when fluid is forced into the top of the cylinder 18 (Fig. l) the piston rod 17 will be lowered, and when fluid is entered into the bottom of the cylinder 18 (Fig. 1) the piston rod 17 will be raised. Any other desired means for raising and lowering the inner end 13x of the tilting beam, however, may be utilized, either mechanical, pneumatic or hydraulic, the same forming no part of my present invention.

In order to simultaneously steer the two guide rolls 4 and 5, king pin 9 is provided with a laterally extending arm 20 (Fig. 2) and king pin 15 is provided with a correspondingly directed arm 21, the outer ends of which arms 2(1 21 are connected by a link 22 (Fig. 2). The arm 21 has an extension 23 at the side of king pin 15 opposite from the arm 21, and to the outer end of arm 23 is pivoted the end of a piston rod 24 carrying a piston 25 housed in a cylinder 26 carried by the tilting beam 11-12-13, and having connections at each end thereof (not shown) for admitting Huid under pressure to either end of the cylinder 26, whereby as piston 25 is shifted in cylinder 26 the arms 20 and 21 will be simultaneously shifted through link 22 to simultaneously turn the guide roiis 4 and :S in their trunnions S and le through equal arcuate amounts. Obviously, any other means for shifting the arm 23 could be provided, the particular type of means forming no part of my present invention.

By the above construction, regardless of the tilting movement of tilting beam ill-M243, the king pins 9 and .l of the two guide rolls 5 and 4 will remain on tixed center distances, and the guide rolls d and 5 may be steered through the arms and linkages above described without binding due to variation in the vertical angularities of the king pins g and 15, which, as above stated, remain on fixed center distances.

ln Figs. 4 and 5, the 3-axle tandem road roller is substantially identical with that shown in Fig. l, the frames ll-l supporting drive roll 3 and having arched portions ia which support the extensions lib. ln this modification the extensions lb are connected at their forward ends by a semi-circular plate im and are closed at the top by means of a cover plate '.ln, the extension being open at its bottom.

The forward end of extension ib carries the trunniou 3b (Fig. 4) for king pin 31 of end guide roll 5, and is thereby prevented from tilting movement with respect to the road roller frame.

The tilting beam 32 comprises a substantially 'T-shaped casting (Fig. 5) which is pivotally connected at its forward end between the sides of the extensions 1b, the same being mounted upon a pivot rod 33 whose ends are journaled in bearings 34 carried by the sides of extension lb in rear of trunnion 3b. In rear ot pivot rod 33 the tilting beam 32 is reduced in width, as at 32a, and carries the trunnion 35 of king pin 35a for intermediate guide roll 4; and in rear of the trunnion 35, the tilting beam is provided with extensions 32h which are spaced apart and carry the pivot 36 for piston rod 37 carrying a piston housed within cylinder 38, which corresponds with the cylinder 18 shown in Fig. l, whereby when piston rod 37 is raised or lowered within cylinder 38, the tiiti-ng beam 32 will be correspondingly tilted to raise or lowcr the trunnion 35 of intermediate guide roll d.

In this modification the king post 3l of the end guide roll 5 carries a laterally extending arm 39, and the king post of intermediate guide roll 4 carries a similar arm 4l?, which arms are connected by a link 41. The king post 35a of the intermediate guide roll 4 also carries an arm 42 at the side opposite from arm 4t?, to the outer end of which is connected a piston rod .3 carrying a piston Within steering cylinder 4d into which tluid under pressure can be admitted to either end by means (not shown) to canse simultaneous steering of the guide rolls 4 and 5. The end of the cylinder 44 opposite from arm 42 is pivoted as at 45 to a bracket 46 carried by tilting beam 32.

In this modification it is obvious that the vertical axis of the king post 3l will remain vertical with respect to the road roller frame 1 1, while when the tilting beam is raised or lowered the vertical axis of king post 35a may tilt with respect to the vertical. However, the pivots connecting the arrns 39-4@ with the lin-k 4l, and the pivots of cylinder 44 and the pivot 45 of cylinder 44 of piston rod 43, which is connected to arm 42, may be suflciently loose or have suicient play to permit simul taneous steering of guide rolls 4 5 without binding of the steering linkage. The above construetionprovides a more simplified structure than that shown in Figs, l, 2 and 3.

In Figs. 6 and 7 a `3axle tandem road roller is shown in which the parts are generally similar to those shown in the ypreceding gures. in Figs. 6-7, the road roller frame side frames I l are supported upon a drive roll 3 in the usual manner, the side frames 1-1 terminating in arched portions 1b at the end opposite from drive roll 3. The extension 1b is provided with'a top recess bounded by the parallel walls 1p which are connected at their inner 4 cnds by a semi-circular wall lq, as shown in Fig. 7, thereby providing a slot extending into the top of the extension lb.

At the outer end of extension lib at thc upper outer corners thereof are opposed bearings Sti for pivot pins 5l (Fig. 6) which support the tilting beam 52, which may be of any desired shape, said tilting beam being adapted to be tilted in a vertical direction on the pivots Si.

The outer end of the tilting beam S2 carries the trunnion 53 for the king post 54 of the yoke 55 of the end guide roll 5, while at the end of the extension lb of the frame is mounted a trunnion 55 for the king post 57 of yoke S3 of the intermediate guide roll 4.

The inner end of tilting beam 52 carries spaced lugs 52a in which is mounted the pivot pin 59 connected to a piston rod 6@ entering a cylinder 6E (Fig. 6), said rod 6i) having a piston within said cylinder which can be raised or lowered depending upon the end of cylinder 61 into which iinid under pressure is admitted.

For simultaneously steering the guide rolls i and 5, the king post S7 of the intermediate guide roll #i carries a laterally extending arm 62, and the king post 543 of end guide roll 5 carries a similar arm 63, which arms 62--63 are connected by a link 642, as shown in Fig. 7.

The king pin 57 also carries an arm 65 at the side opposite from arm 62, to which is connected piston rod on of a steering cylinder 67, the inner end of which cylinder is pivoted as at 68 within the extension lb of the road roller frame, whereby as the rod is moved back and forth by hydraulic pressure within either end of cylinder 67, king posts 5d and 57 will be simultaneously shifted to steer or turn the yokes 5S, 53 of the guide rolls 4 and 5.

ln this modification, the vertical axis of king post 57 remains fixed with respect to the road roller frame, while the vertical axis of king post 5d carried by tilting beam 52 may shift with respect to said vertical when the tilting beam 52 is tilted on its pivots 5i. However, the pivotal connections between the arms 63, 62 and :55 with respect to the link 64 and the piston rod 66 may be sufficiently loose to prevent binding of the parts regardless of the particular angularity of tilting .beam 52 with respect to the road roller frame.

instead of using power cylinders and piston rods for actuating the arms which simultaneously cause the guide rolls 4 and 5 to rotate through equal arcs, these may be replaced by other means, either mechanically, hydraulically or pneumatica'lly operated. Also, the pan ticular means for raising and lowering the tilting beams may likewise be replaced by other means, either mechanically, hydraulically .or pneumatically operated.

My invention yabove described provides 3-axle tandem road .rollers having three or more axles in tandem, in which one of the guide rolls is mounted upon a tilting beam so that the guide roll carried thereby can be raised above or below, or be disposed in, the plane of the other guide roll and the drive roll. My invention, moreover, provides simple, novel and eiicient means for so mounting the vertically adjustable lguide roll.

l do not limit my invention to the exact forms shown in the drawings, for obviously changes may be made therein within the scope of the claims.

I claim:

l. In a road roller or the like having three or more rolls arranged in tandem and having a frame supported Vadjacent one end by a driven drive roll and supported adiacent its opposite end by a plurality of guide rolls; a trunni'on supported on said Opposite end; a king post journaled insaid trunnion and carrying a yoke in which one of the guide rolls is mounted; a tilting beam having one end journaled in horizontal pivots carried by said frame; a second trunnion mounted in said tilting beam; a second king post journaled in said second trnnnion and carrying a yoke in which another 'of said guide rolls is mounted; means on the frame for pivoting land locking the tilting beam in desired angular eleva-tion; and means for simultaneously rotating the king posts in their respective trunnions in the same direction to steer the said guide rolls.

2. In a road roller as set forth in claim 1, the axis of the tirst mentioned king post intersecting the horizontal axis of the tilting beam pivots, and the first mentioned trunnion being also mounted in the tilting beam, whereby the axes of both king posts will remain at Iixed distances apart and at the same vertical angularities irrespective of the tilting movement of the beam.

3. In a road roller as set forth in claim 1, the horizontal pivots of the tilting beam being disposed between the lirst mentioned trunnion and the drive roll; and the second trunnion being disposed adjacent the free end of the tilting beam.

4. In a road roller as set forth in claim 1, the horizontal pivots of the tilting beam being disposed at the side of the first mentioned trunnion opposite from the drive roll; and the second trunnion being disposed adjacent the free end of the tilting beam.

5 In a road roller as set forth in claim 1, said steering means comprising laterally extending arms on said king posts; a link connecting said arms; means for swinging said arms; the horizontal pivots of the tilting beam being disposed between the first mentioned trunnion and the drive roll; the second trunnion being disposed adjacent the free end of the tilting beam; and the connections between the arms and link being suciently loose to prevent binding of the parts as the tilting beam is pivoted.

6. In a 3-axle tandem road roller or the like, having a frame supported adjacent one end by a driven drive roll and having at its opposite end an arched extension supported by a pair of guide rolls; a trunnion mounted on the outer end of said extension; a king post journaled in said trunnion and carrying a yoke in which one of the guide rolls is mounted; a tilting beam having one end journaled in horizontal pivots carried by said extension; a second trunnion mounted in said tilting beam; a second king post journaled in said second trunnion and carrying a yoke in which the other guide roll is mounted; means on the frame for pivoting and locking the tilting beam in desired angular elevation; and means for simultaneously rotating the king posts in their respective trunnions in the same direction to steer the said guide rolls.

References Cited in the file of this patent UNITED STATES PATENTS 1,999,665 Schroeder Apr. 30, 1935 2,015,891 Greiner Oct. 1, 1935 2,132,059 Trembly Oct. 4, 1938 2,171,255 Keeler Aug. 29, 1939 2,386,025 Wills Oct. 2, 1945 2,612,090 Revers Sept. 30, 1952 

